CVE-2021-23028

HIGH

7.5

CVSS Score

Published: September 14, 2021 at 08:53 PM UTC

Updated: June 17, 2026 at 03:38 AM UTC

2 products affected across 1 vendorBig IP Application Security ManagerBig IP Advanced Web Application Firewall

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Severity

HIGH7.5

Exploit prediction

EPSS 0.9%

Description

On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3.1, 14.1.x before 14.1.4.2, and 13.1.x before 13.1.4, when JSON content profiles are configured for URLs as part of an F5 Advanced Web Application Firewall (WAF)/BIG-IP ASM security policy and applied to a virtual server, undisclosed requests may cause the BIG-IP ASM bd process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Big IP Advanced Web Application Firewall · F5

95%

13.1.3.5 ≤ v ≤ 13.1.3.614.1.3.1 ≤ v ≤ 14.1.4.115.1.1 ≤ v < 15.1.3.116.0 ≤ v < 16.0.1.216.0.1

Affected range stops below 15.1.3.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.0.1.2, so it looks safe — our inference, not a vendor statement

Big IP Application Security Manager · F5

95%

13.1..3.5 ≤ v ≤ 13.1.3.614.1.3.1 ≤ v ≤ 14.1.4.115.1.0 ≤ v < 15.1.3.116.0 ≤ v < 16.0.1.216.0.1

Affected range stops below 15.1.3.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.0.1.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://support.f5.com/csp/article/K00602225

References (1)

x_refsource_MISCMitigationVendor Advisory

Source: [email protected]

https://support.f5.com/csp/article/K00602225

CVSS

7.5HIGH[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-20

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